; C02 dirent.h02 Assembly Language Subroutines
; Requires external functions ...
; external zero page locations ...
; and external locations ...

;opndir() - Open Directory for Reading
;Args: A = Drive Identifier
;      Y,X = Pointer to Directory Name
;Returns: A = File Pointer (0 = Not Opened)
;         Y = Error Code (0 = None)
OPNDIR:  ;Return Error - Not Implemented (fall through)

;rdhdr() - Read Directory Header
;Note: Call once before first readdir
;Args: A = Directory File Pointer
;      Y,X = Pointer to HDRENT buffer
;Returns: A = Length of Header (0=None)
;         Y = Error Code (0=None)
RDHDR:   ;Return Error - Not Implemented (fall through)

;rddir() - Read Directory Entry
;Args: A = Directory File Pointer
;      Y,X = Pointer to dirent structure 
;Returns: A = Length of Entry (0=None)
;         Y = Error Cooe (0=None)
RDDIR:  LDA #$00          ;Return Result - None
        LDY #$FF          ;and Error - Not Implemented
        RTS
        
;clsdir() - Close Directory File
;Args: A = Directory File Pointer
;Returns: A = Error Code (0 = Success)
CLSDIR: LDA #$FF    ;Return Error - Not Implemented
        RTS